I'm a RF telecomunication engineer and I think wouldn't be a big deal to these radios manufactors to install some small receiver scan in their radios that would check for any signal in the air, within the RC spectrum, right when you turn your radio ON which wouldn't allow it to turn the TX power on if your frequency is being used already!
Besides, it wouldn't be also a big deal to have a dual frequency mode radio and receiver, auto switchable, in case interference is experienced.
In the mean time, I have a JR radio X378 that like many other I guess, has the feature of "safe mode" or something like that, which assign specific positions to all servos if any interference is happening. This would give you, maybe, some time and with luck, the interference could vanish before your plane hit the ground.


Nilo